I have a Model S 75D with MCU2 & AP3. The car's usual sleep pattern is 58 minutes asleep, 14 minutes awake.
It consumes ~30W whilst being awake. Extrapolating, over a year the car would be awake for 1703h, or 51kWh of energy. This is okay-ish as even at 40p/kWh we'll lose ~20 quid/year.
I've...